JConcepts Fin 17mm 1/8th Serrated Light Weight Wheel Nuts are flanged and knurled for locking security and feature a closed end to protect from dirt and debris build-up in the axle or hub. Precision CNC machined, the large flange and clamping surface area supports the wheel and helps maintain geometry during flex and load. The larger area also provides more footing for the serrated area which provides a more comfortable lock-down. Cutting weight was accomplished by reducing material sections in unneeded areas, in addition, the nut is sliced removing even more bulk and adding a “Fin” like appearance. The closed-end cap features an etched logo for authenticity and brand awareness.
Features:

I'm pleased with other other jcon items, these not so much. If you have the time to be super careful taking these on or off then they are fine. If your in a hurry then the "wings" will break off. That resulted in using channel locks. I only used them for the mains. The knurled side is top notch and works perfectly.